Analog Devices Inc. AD9884AKSZ-140

Overview

AD9884AKSZ-140 from Analog Devices is an 8-bit, 140 MSPS analog-to-digital converter optimized for RGB graphics signal capture in flat-panel display interfaces. It features 500 MHz full-power analog bandwidth, internal 1.25 V reference, and on-chip PLL generating pixel clock from HSYNC - enabling accurate digitization of SXGA (1280 × 1024 @ 75 Hz) PC graphics signals with minimal external components.

For engineers reviewing the AD9884AKSZ-140 datasheet, AD9884AKSZ-140 pinout, AD9884AKSZ-140 application, or AD9884AKSZ-140 equivalent, this device serves as a complete analog front-end for LCD monitors, plasma displays, and scan converters requiring high-fidelity pixel sampling, programmable clamp/gain/offset, and dual-port demultiplexed CMOS outputs.

Technical Context

The AD9884AKSZ-140 integrates three identical 8-bit ADC channels (R/G/B), each with 0.5 V to 1.0 V p-p input range, programmable gain (0–255), and 6-bit offset adjustment. Its PLL accepts 15–110 kHz HSYNC input and generates pixel clocks from 20 MHz to 140 MHz with ≤475 ps p-p jitter (typical).

It supports two operational modes: Single Channel (all data on Port A) and Dual Channel (alternating pixels on Ports A/B), with configurable output timing (parallel or interleaved) and phase-adjustable sampling (32-step). Internal clamp generation or external CLAMP/SOGIN control enables robust black-level stabilization across diverse video sources.

Key Specifications

Pinout & Package

AD9884AKSZ-140 is housed in a 128-lead MQFP (S-128) surface-mount package, specified for 0°C to +70°C operation. The package includes dedicated power domains (VD, VDD, PVD) and extensive ground pins to isolate analog, digital output, and PLL sections.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog flat-panel interface applications.

Compared with AD9884AKSZ-140, the AD9884AKSZ-100 offers identical architecture at reduced speed for cost-sensitive XGA applications, while the TVP5150AM1 serves a fundamentally different video domain (broadcast decoding vs. PC graphics digitization) and cannot replace the AD9884AKSZ-140 in flat-panel RGB capture systems.

Availability

AD9884AKSZ-140 is available at Aetrix Electronics and suitable for LCD monitor manufacturing, plasma display panel integration, and embedded projector development requiring stable component supply and long-term industrial availability.

Supply support for AD9884AKSZ-140 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.

The AD9884A product line was designed specifically for analog-to-digital conversion of PC-originated RGB graphics signals in flat-panel display interfaces - emphasizing low-jitter clock synthesis, programmable analog conditioning, and compact system integration.

FAQ

What is the maximum display resolution supported by the AD9884AKSZ-140?

The AD9884AKSZ-140 supports display resolutions up to 1280 × 1024 (SXGA) at 75 Hz. This capability is enabled by its 140 MSPS sampling rate and 500 MHz full-power analog bandwidth, which ensure accurate acquisition of each pixel without aliasing or edge degradation in high-resolution PC graphics signals.

Does the AD9884AKSZ-140 require an external pixel clock source?

No, the AD9884AKSZ-140 does not require an external pixel clock source. Its on-chip PLL generates the pixel clock directly from the HSYNC input signal, supporting frequencies from 20 MHz to 140 MHz. An external clock may be used via the CKEXT pin if EXTCLK is enabled, but it is optional - the AD9884AKSZ-140 is fully functional with only HSYNC provided.

How does the dual-port output mode work on the AD9884AKSZ-140?

In dual-port mode (DEMUX = 1), the AD9884AKSZ-140 routes odd-numbered pixels to Port A and even-numbered pixels to Port B of each color channel. When PAR = 1, both ports output simultaneously at half the sampling rate (70 MSPS), allowing parallel capture; when PAR = 0, data appear interleaved at full rate. The AD9884AKSZ-140 maintains strict timing alignment between DATACK, DATACK, and all data outputs regardless of mode.

Can the AD9884AKSZ-140 handle Sync-on-Green (SOG) signals?

Yes, the AD9884AKSZ-140 includes a dedicated SOG slicer with a 0.15 V threshold comparator on the SOGIN pin. When a dc-coupled RGB signal with embedded sync is applied, SOGOUT delivers a clean digital composite sync output. The SOG slicer remains active even in power-down mode, making the AD9884AKSZ-140 suitable for systems requiring always-on sync detection.

What power supply requirements does the AD9884AKSZ-140 have?

The AD9884AKSZ-140 requires three separate supplies: VD (3.3 V ±10% for analog core), VDD (2.5 V to 3.3 V ±10% for CMOS outputs), and PVD (3.3 V ±10% for PLL). This separation minimizes noise coupling - especially critical for maintaining low PLL jitter and ADC accuracy. Ground connections are distributed across 28 pins to ensure low-impedance return paths.